June 5, 1985

WEDNESDAY, JUNE 5, 1985 International The White House assailed Nicaragua for what it called ''increased aggressive behavior'' against neighboring Honduras and Costa Rica. [Page A1, Column 1.] Possible intervention in Nicaragua by American combat troops at some future date if other policies fail is being openly discussed by officials of the Reagan Administration for the first time, according to nearly 50 military, diplomatic and foreign government experts who were interviewed in Washington, Panama, Costa Rica, Nicaragua and Honduras. [A1:2-3.]

Black producers of hair-care products say these should be robust days. After all, a large percentage of their principal clientele, black consumers, have become more affluent, and are using more hair-care products than ever. Moreover, recent industry figures indicate that blacks individually spend three to four times more on such products than whites - with black spending reaching an estimated total of $2.3 billion last year. Instead, black-owned hair-care companies have found these times riddled with a proliferation of products and less-than-buoyant sales growth. What is more, even though blacks consume an expanding share of the nation's hair-care products, about 35 percent, they are apparently spending more on goods produced by the giants of the cosmetics and personal-care industry, such as Revlon Inc. and the Alberto-Culver Company.

The White House condemned Nicaragua today for what it called ''increased aggressive behavior'' against neighboring Honduras and Costa Rica. ''The U.S. strongly condemns these actions and calls upon the Government of Nicaragua to halt immediately any further military operations against its neighbors,'' said Larry Speakes, the White House spokesman. At another point, Mr. Speakes said, ''We're seriously concerned at signs of increased aggressive behavior by the Government of Nicaragua against its neighbors.''

IT is 9 on a weekday night at Petaluma and the scene is as hot as a mesquite grill. A tall blond woman in a black jump suit holds a clipboard scribbled with names of customers who are waiting three deep at the bar in this animated new Italian restaurant at First Avenue and 73d Street. Three men in their early 30's, wearing dark suits, white shirts loosened at the collar and expressions of subdued awe, scan the premises. ''You have any tables up front?'' one of them asks, craning his neck above the crowd to assay his chances. The hostess points to the bar with a sweeping gesture. ''It looks like 45 minutes to an hour,'' she replies with a well-rehearsed expression of sympathy. The three form a quick huddle and decide to stay. One hour, 10 minutes and three rum and tonics later, they sit down at a table in the elevated front room. Was it worth the wait? ''Sure,'' 29-year-old Marc Breiter said. ''This is only my third time here and I've already met a half-dozen people. Sitting up here I may see one of them come in. If I'm way in the back I might as well be in the pizzeria next to my apartment.''

The Reagan Administration, responding to what it calls unfair trade practices by the European Economic Community, today announced the first sale of commodities to a foreign country under its new export subsidy program. The transaction involves up to one million metric tons of wheat for Algeria, including an unspecified quantity of surplus wheat to be released from Government stocks and given to American exporters at no cost. Officials said the bonus would make it possible for the exporters to meet subsidized European export prices. Agriculture Secretary John R. Block announced the sale just a few hours before leaving on a trip to Western Europe, where America's allies have criticized the export subsidy program, warning of a trade war.